Hi Brendan, I love your patch! Yet something to improve: [auto build test ERROR on wsa/i2c/for-next] [also build test ERROR on v4.19-rc4 next-20180921] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Brendan-Higgins/i2c-aspeed-fix-invalid-clock-parameters-for-very-large-divisors/20180922-134643 base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=arm All errors (new ones prefixed by >>): drivers/i2c/busses/i2c-aspeed.c: In function 'aspeed_i2c_probe_bus': >> drivers/i2c/busses/i2c-aspeed.c:920:24: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types] bus->get_clk_reg_val = (u32 (*)(u32))match->data; ^ cc1: some warnings being treated as errors vim +920 drivers/i2c/busses/i2c-aspeed.c 87b59ff8d Brendan Higgins 2017-07-28 875 f327c686d Brendan Higgins 2017-06-20 876 static int aspeed_i2c_probe_bus(struct platform_device *pdev) f327c686d Brendan Higgins 2017-06-20 877 { 87b59ff8d Brendan Higgins 2017-07-28 878 const struct of_device_id *match; f327c686d Brendan Higgins 2017-06-20 879 struct aspeed_i2c_bus *bus; f327c686d Brendan Higgins 2017-06-20 880 struct clk *parent_clk; f327c686d Brendan Higgins 2017-06-20 881 struct resource *res; f327c686d Brendan Higgins 2017-06-20 882 int irq, ret; f327c686d Brendan Higgins 2017-06-20 883 f327c686d Brendan Higgins 2017-06-20 884 bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL); f327c686d Brendan Higgins 2017-06-20 885 if (!bus) f327c686d Brendan Higgins 2017-06-20 886 return -ENOMEM; f327c686d Brendan Higgins 2017-06-20 887 f327c686d Brendan Higgins 2017-06-20 888 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); f327c686d Brendan Higgins 2017-06-20 889 bus->base = devm_ioremap_resource(&pdev->dev, res); f327c686d Brendan Higgins 2017-06-20 890 if (IS_ERR(bus->base)) f327c686d Brendan Higgins 2017-06-20 891 return PTR_ERR(bus->base); f327c686d Brendan Higgins 2017-06-20 892 f327c686d Brendan Higgins 2017-06-20 893 parent_clk = devm_clk_get(&pdev->dev, NULL); f327c686d Brendan Higgins 2017-06-20 894 if (IS_ERR(parent_clk)) f327c686d Brendan Higgins 2017-06-20 895 return PTR_ERR(parent_clk); f327c686d Brendan Higgins 2017-06-20 896 bus->parent_clk_frequency = clk_get_rate(parent_clk); f327c686d Brendan Higgins 2017-06-20 897 /* We just need the clock rate, we don't actually use the clk object. */ f327c686d Brendan Higgins 2017-06-20 898 devm_clk_put(&pdev->dev, parent_clk); f327c686d Brendan Higgins 2017-06-20 899 edd20e95b Joel Stanley 2017-11-01 900 bus->rst = devm_reset_control_get_shared(&pdev->dev, NULL); edd20e95b Joel Stanley 2017-11-01 901 if (IS_ERR(bus->rst)) { edd20e95b Joel Stanley 2017-11-01 902 dev_err(&pdev->dev, 6bc33c519 Jae Hyun Yoo 2018-07-02 903 "missing or invalid reset controller device tree entry\n"); edd20e95b Joel Stanley 2017-11-01 904 return PTR_ERR(bus->rst); edd20e95b Joel Stanley 2017-11-01 905 } edd20e95b Joel Stanley 2017-11-01 906 reset_control_deassert(bus->rst); edd20e95b Joel Stanley 2017-11-01 907 f327c686d Brendan Higgins 2017-06-20 908 ret = of_property_read_u32(pdev->dev.of_node, f327c686d Brendan Higgins 2017-06-20 909 "bus-frequency", &bus->bus_frequency); f327c686d Brendan Higgins 2017-06-20 910 if (ret < 0) { f327c686d Brendan Higgins 2017-06-20 911 dev_err(&pdev->dev, f327c686d Brendan Higgins 2017-06-20 912 "Could not read bus-frequency property\n"); f327c686d Brendan Higgins 2017-06-20 913 bus->bus_frequency = 100000; f327c686d Brendan Higgins 2017-06-20 914 } f327c686d Brendan Higgins 2017-06-20 915 87b59ff8d Brendan Higgins 2017-07-28 916 match = of_match_node(aspeed_i2c_bus_of_table, pdev->dev.of_node); 87b59ff8d Brendan Higgins 2017-07-28 917 if (!match) 87b59ff8d Brendan Higgins 2017-07-28 918 bus->get_clk_reg_val = aspeed_i2c_24xx_get_clk_reg_val; 87b59ff8d Brendan Higgins 2017-07-28 919 else 5799c4b2f Jae Hyun Yoo 2018-07-24 @920 bus->get_clk_reg_val = (u32 (*)(u32))match->data; 87b59ff8d Brendan Higgins 2017-07-28 921 f327c686d Brendan Higgins 2017-06-20 922 /* Initialize the I2C adapter */ f327c686d Brendan Higgins 2017-06-20 923 spin_lock_init(&bus->lock); f327c686d Brendan Higgins 2017-06-20 924 init_completion(&bus->cmd_complete); f327c686d Brendan Higgins 2017-06-20 925 bus->adap.owner = THIS_MODULE; f327c686d Brendan Higgins 2017-06-20 926 bus->adap.retries = 0; f327c686d Brendan Higgins 2017-06-20 927 bus->adap.timeout = 5 * HZ; f327c686d Brendan Higgins 2017-06-20 928 bus->adap.algo = &aspeed_i2c_algo; f327c686d Brendan Higgins 2017-06-20 929 bus->adap.dev.parent = &pdev->dev; f327c686d Brendan Higgins 2017-06-20 930 bus->adap.dev.of_node = pdev->dev.of_node; f327c686d Brendan Higgins 2017-06-20 931 strlcpy(bus->adap.name, pdev->name, sizeof(bus->adap.name)); f327c686d Brendan Higgins 2017-06-20 932 i2c_set_adapdata(&bus->adap, bus); f327c686d Brendan Higgins 2017-06-20 933 f327c686d Brendan Higgins 2017-06-20 934 bus->dev = &pdev->dev; f327c686d Brendan Higgins 2017-06-20 935 f327c686d Brendan Higgins 2017-06-20 936 /* Clean up any left over interrupt state. */ f327c686d Brendan Higgins 2017-06-20 937 writel(0, bus->base + ASPEED_I2C_INTR_CTRL_REG); f327c686d Brendan Higgins 2017-06-20 938 writel(0xffffffff, bus->base + ASPEED_I2C_INTR_STS_REG); f327c686d Brendan Higgins 2017-06-20 939 /* f327c686d Brendan Higgins 2017-06-20 940 * bus.lock does not need to be held because the interrupt handler has f327c686d Brendan Higgins 2017-06-20 941 * not been enabled yet. f327c686d Brendan Higgins 2017-06-20 942 */ f327c686d Brendan Higgins 2017-06-20 943 ret = aspeed_i2c_init(bus, pdev); f327c686d Brendan Higgins 2017-06-20 944 if (ret < 0) f327c686d Brendan Higgins 2017-06-20 945 return ret; f327c686d Brendan Higgins 2017-06-20 946 f327c686d Brendan Higgins 2017-06-20 947 irq = irq_of_parse_and_map(pdev->dev.of_node, 0); f327c686d Brendan Higgins 2017-06-20 948 ret = devm_request_irq(&pdev->dev, irq, aspeed_i2c_bus_irq, f327c686d Brendan Higgins 2017-06-20 949 0, dev_name(&pdev->dev), bus); f327c686d Brendan Higgins 2017-06-20 950 if (ret < 0) f327c686d Brendan Higgins 2017-06-20 951 return ret; f327c686d Brendan Higgins 2017-06-20 952 f327c686d Brendan Higgins 2017-06-20 953 ret = i2c_add_adapter(&bus->adap); f327c686d Brendan Higgins 2017-06-20 954 if (ret < 0) f327c686d Brendan Higgins 2017-06-20 955 return ret; f327c686d Brendan Higgins 2017-06-20 956 f327c686d Brendan Higgins 2017-06-20 957 platform_set_drvdata(pdev, bus); f327c686d Brendan Higgins 2017-06-20 958 f327c686d Brendan Higgins 2017-06-20 959 dev_info(bus->dev, "i2c bus %d registered, irq %d\n", f327c686d Brendan Higgins 2017-06-20 960 bus->adap.nr, irq); f327c686d Brendan Higgins 2017-06-20 961 f327c686d Brendan Higgins 2017-06-20 962 return 0; f327c686d Brendan Higgins 2017-06-20 963 } f327c686d Brendan Higgins 2017-06-20 964 :::::: The code at line 920 was first introduced by commit :::::: 5799c4b2f1dbc0166d9b1d94443deaafc6e7a070 i2c: aspeed: Add an explicit type casting for *get_clk_reg_val :::::: TO: Jae Hyun Yoo <jae.hyun.yoo@xxxxxxxxxxxxxxx> :::::: CC: Wolfram Sang <wsa@xxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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